Perforating device



Feb. 5, 1946. I c. J. HUEBER ETAL 2,394,385

PERFORATING DEVICE Filed March 9, 1944 2 Sheets-Sheet 1' 7 Feb. 5, 1946. c. J. HUE-BER ETAL 2,394,385

PERFORATING DEVICE Filed March 9, 1944 2 Sheets-Sheet 2 F 5' 7 45 9 j E. 58 7 45 4 243 odd/ 34 be. 0O 2 Patented Feb. 5, 1946 UNITED STATES PATENT OFFICE loughby, Ohio, assignors to Addre'ssograph- Multigraph Corporation, Cleveland, Ohio, a

corporation of Delaware Application March 9, 1944, Serial No. 525,712

Claims.

This invention relates to perforating devices of the character that 'may be hand carried and operated to form perforations in cards, sheets or the like.

Many machines are operated under control of cards or other devices bearing perforations at selected ones of a plurality of predetermined positions that are, in many instances, produced in the cards or like devices through the intermediary of keyboard operated perforating or punching means. There are, however, many instances Where it is advantageous or even necessary that perforations of the aforesaid Character be produced by means of a hand carried and operated punch.

Forexample, among the devices which are employed in business machines to control 'or determine operation thereof are printing and control devices of, for example, the character to Which Gollwitzer Patent No. 2,132,412, patented October 11, 1938, relates and of the character disclosed in the copending application of Carl J. Hueber, Serial No. 596,991, filed June 1, 1945. Such printing and control devices comprise a carrier on which one or more cards are reiiiovab'ly secured, the carrier and cards having aligned perforations at predetermined, positions. During the passage of such printin and control devices through the machines in which they are utilized, means in the machines cooperate with at least one selected perforation to control or determine functioning of the machine. While such aligned perforations may be and are formed in the devices by keyboard controlled perforating devices, there are many instances where it is convenient, or even necessary, that one or more perforations be produced manually and apart from keyboard operated devices. Hence, a primary object of our inventon is to provide a novel and efficient device that may be used for such purposes. I

Printing and control devices of the aforesaid character which have cards or the like removably secured thereon are usually so arranged that the cards a'fiord fields or areas in which the control perforations may be formed and, in some in stances, selected ones of these fields are adapted to have perforations formed therein to be representative of numerical or like data, and other of the fields are arranged to have perforations formed therein at selected ones of predetermined positions so that operation of determined mechanisms in the machines through which the devices are passed may be brought about or suppressed. Printing and control devices of the character disclosed in the aforesaid copending application of Carl J. Hueber are so arranged that a field of the aforesaid character is afforded along one of the edges thereof and these devices are so arranged that perforations are provided at predetermined positions in the portion of the carrier that'under lies the card. Furthermore, the printing and control dev ices disclosed in Gollwitzer Patent No. 2,134,212 may also have perforations formed in the portion of the carrier underlying the card defining the field wherea't data representing perforations may be "formed.

The perforating device to which the present invention relates is particularly adapted for use with printing and control devices of the character disclosed in Gollw-itzer Patent No. 2,132,412 and in the aforesaid c-opending application of Carl J. Hueber, which. is to say, the perforating device of the present invention is particularly adapted for use with a device embodying a carrier having perforations formed therein at predetermined positions and wherein a card or the like overlies such perforations so that a control perforation may be afforded in the printing and control device by forming a perforation in the card or the like in alignment with a perforation in the underlying portion of the carrier on which the card is removably retained.

In such instances, it is essential that the perforation, which is formed in the card in alighment with an underlying perforation in the frame or carrier, be accurately oriented with the perforation in the frame or carrier and, therefore, among the important objects of our invention is to so arrange a perforating device that the punch or perforating element thereof may be accurately positioned so as to insure accurate orientation of a perforation formed thereby in a card or the like relative to an underlying perforation in the carrier on which the card is removably secured.

Yet another object of the invention is to so arrange a perforating device adapted to produce a perforation in a card or the like retained on the carrier therefor that the perforation in the carrier, with which the perforation in the card is to be aligned, will serve as the die in the card perforating operation, to align the punch or perforating element of a perforating device with a guide in the device that may be inserted into a perforation in the carrier to thereby orient the punch relative to the perforation in the carrier and hence insure that the punchwill perforate a card or the like overlying the perforation in the carrier in alignment with such perforation in the carrier; to so arrange the guide in the perforating device that it will be retracted from the perforation in the carrier as an incident to the perforating of a card overlying such perforation by'the punch or perforating element of the perforating device; and to yieldingly urge the guide 'into a projecting position and thereby enable retraction thereof as aforesaid in a perforatin operation and yet insure return thereof to its projecting position upon retraction of the punch or perforat ng element.

In instances where a perforation is to be formed in a card or the like in alignment with a per-' foration ina carrier for the card or the like, the carrier is usually made of material different from and. stronger than that of which the card or the like is made and in such instances it'is advantageous to so arrange the perforating device that the punch or perforating element will not perforate the carrier in a' perforating operation Fig. 7 is a fragmentary enlarged vertical sectional view of the punch head, showing a device positioned therein prior to perforating a hole i a card carried by the device;

Fig. 8 is a view similar to 7, showing the 7 parts in a position occupied at the completion of a punching operation; I

Fig. 9' is a view showing a fragment of a device bearing a card that may be perforatedby'the punch of the present invention;

Fig. 10 isa fragmentary longitudinal sectional view of a punch embodying a modified form of construction; and

Fig. 11 is a horizontal sectional view of the punch head taken substantially on line II-I on Fig. 10.

thereof and to enable this to be realized is yet another object of this invention. Objects related to the foregoing are to so arrange the perforating element of a perforating device that movement thereof in perforating direction will be arrested character that it will restore to perforating element advancing condition upon retraction of the perforating element from engagement with ma terial which offers more than predetermined resistance to the advancing of the element in a perforating direction.

Further objects are to provide a perforating device of the aforesaid character that is light in weight and completely encased so as to enable its being used extensively without injury to the user; and to provide a perforating device of simple The perforating device embodying the present invention that, is illustrated in Figs. 1 to 8, in-

clusive, of the accompanying drawings is of a size to be conveniently operated by hand and includes a central frame consisting of a front or head portion II and an elongated body portion I2; The head portion II is fashioned to be'substantially U-shaped in configuration in plan from a strap of sheet material and includes spaced side walls I3 and a connecting front end wall I4. The front end wall I4 and the front marginal sections of the side walls I3 are divided into vertically spaced apart portions by the removal of an intermediate portion of the material of the head pQ ition II so as to provide a jaw opening as at I5. The" body portion I2 of the central frame consists of parallelspaced side walls I5 and a curved connecting end Wall II.' The free ends of the side walls I6 are disposed in abutment with the free ends of the side walls I3 of the head portion I I, as indicated at I8:r,Figs."3 and 4,]and the. two portions are firmly interconnected by a U-sh'aped transversely extending strap I8 which has its leg scription and claims and are illustrated in the accompanying drawings which, by way of illustration, show preferred embodiments and the principle thereof and which are now considered to be the best modes in which I have contemplated applying that principle.

Other embodiments of the invention embodying the same or equivalent principle may be used and structural changes may be made as desired by those skilled in the art without departing from the present invention and the purview of the appended claims. 7

Inthe drawings: Fig. 1 is a side elevational view of a hand punch embodying the present invention;

Fig.2 is a top plan view of the punch shown in Fig. 1; Fig. 3 is a longitudinal sectional view of the punch; V V

Fig. 4 is a horizontal sectional view, taken substantially on lin 4-4 on Fig. 3;

1 Fig. 5 is a vertical sectional view of the punch head taken substantially on line 55 on Fig. 3;

Fig. 6 is a vertical sectional view ta en substantially along line 6--6 on Fig. 3;

portions overlying the abutment I 8a, these leg portions being secured to the adjacent portions of the abuttecl pairs of side walls I3 and I6 as indicated at I9 by welding or the like. of the frame may be increased considerably by forming a longitudinal reinforcing rib 2I in each of the side walls I3 and I6.

A reinforcing element 22 is arranged in the jaw i 5 and includes a U-shaped intermediate part having parallel upper and lower wa1ls'23 and 24 respectively, and a vertical connecting back. wall 25. The forward edges of the upper and lower walls 23 and 24 terminate in oppositely extending aligned vertical portions 26 and 21 respectively, which are disposed one against the inside face of each of the spaced portions of thefront end wall I4. The upper margin 28 of the vertical portion 26 extends rearwardly parallel to the upper wall 23 and the lower margin 29 of the vertical portion 27 extends rearwardly parallel to the lower wall 24. The reinforcing element 22 is strengthened by side walls 3| which extend rearwardly and lie one against the inside face of each side wall I3 of the head portion II. one-piece reinforcing element 22 i accurately lo cated within the jaw opening I 5 in the head portion I I by engaging a spot upset 32 therein in a hole 33 in the adjacent portion of the front wall.

Rigidity V The nomes inforcing element 22. The lower end. of the punch 34,Which depends into the jaw opening |5,..is sized, as at 36, to be of the diameter :requiredto perforate holes of the desired size.

An opening is formed in the lower wall 24 of the reinforcing element 22 in alignment with the openings in which the punch 35 is mounted and a guide bushing 31 is firmly secured'in this opening. The bushing has a central opening therein through which the upper end of a guide or plunger 35 is extended to be mounted .in axial alignment with the punch 34. The lower end-of the plunger 35 has a sliding fit through :a hole in the rearwardly turned'margin 29 of the reinforce ing element 22 and a spring 38,surrounding sa'id plunger with one of its ends bearing againstthe margin 29 and its other end bearing against a flange 39 on said plunger, normally urges the plunger upwardly to dispose the free end thereof in the extended position illustrated in Fig. 3 in which circumstances the flange 39 bears against the bushing 37 to limit upward movement of the plunger. To assemble, the plunger 35 and spring 38 are inserted through the opening in thebottom Wall 24 of the jaw and the bushing 31 then is inserted and secured in said openin with the plunger 35 passed through the central opening there n.

In use, the punch 34, which normally remains in the elevated position shown in Fig. 3, is reciprocated in the guide openings therefor to cause the end 35 thereof to penetrate'material inserted into the jaw above the plunger 55. Such reciprocable movement of the punch tool iseifectively accomplished upon manipulation of a lever generally indicated at 4|, which is moved relative to the central frame ||-|2 described hereinabove. The lever 4| includes an elongated U- shaped frame fashioned from a strap of sheet material'and has substantially'parallel side walls 42. The 'free ends of the side walls 42 are extended beneath the bottom wall 24 of the jaw reinforcing element 22 between the rearwardly extending spaced walls 3| thereof and are pivotally secured to said walls 3| by a transverse pin 43.

A toggle connection is provided to operatively connect the lever 4| with the punch 34. the purpose and function of such a connection bein eXplained presently. As best shown in Figs. 3 and 5. the punch shank has diametrically opposed flattened portions 44 intermediate its ends,

each to receive an end of each of the spaced side walls of a rocker arm 45 pivotally mounted intermediate its ends on a transverse pin 46 which has its ends journalled'in the rearwardly spaced walls 3! of the jaw reinforcing element 22. The other end of the rocker arm 45 is. connected by a pivot pin 47 to the adjacent end of an intermediate link 48 preferably formed of two thicknesses of a strap material. The othe end of the intermediate link 48 carries a pair of integral ears 49 which extend transversely in opposite directions for a purpose to be explained presently. Another link 5|, consisting of spaced apart sides joined along their bottom edge by an integral connecting bridge 52, has one end of its spaced sides ofiset outwardly transversely and extended between the spaced walls 42 of the lever frame and is pivotally secured thereto by a pin 53. The other end of the link 5| embraces the free end portion of the intermediate link 48 and is'pivotally secured to the medial portion "of said intermediate link by a pin 54.

The intermediate link 48 and the link 5| :Tc'oact to constitute .a "toggle-link connection lbetweentheilever 4| and the rockerzarm 45. Normany, this toggle link functions as though it were fashioned in one piece so that when the lever 4 Us moved toward the central frame I |-:|2 the'rocker arm 45 is moved about its pivot to force the punch34downwardly into the jaw 1|5.

Unit actuation'of the two links 48 and 5| isbest effected by providing a wire spring 55 which is substantially U-shaped and has it intermediate portion extended transversely beneath the link 5| and its two leg portions laid over the projecting grooved ends of pin '54 and engaged beneath the grooved end portions of the pin 41. The spring 55 is of sufficient tension to "prevent buckling of the toggle under normal operating conditions. However, should the descending punch 34 encounter excessive resistance, as "will be explained presently, the tension of the spring 55 is overcome and the toggle breaks whereupon further movement of the lever may be effected without further descent of the punch 34. The ears 49 on the intermediate link 48 overlie the upper edges of the companion link 5| to prevent the toggle from buckling in a reverse direction under the tension of spring 55.

The central frame I 2 and the lever 4| nor-- mally are retained in spaced apart or open position by a spring 55 which has one or more turns disposed around the pin 53 and which has the free end of one of its elongated arms rested in a notch provided therefor in the upper edge of the rear end wall 42a of the lever 4| and the other elongated arm of the spring 58 bears against the bottom of a transverse reinforcing Wall 5'! in the body portion !2 of the central frame.

A pleasing streamlined appearance is imparted to the device by enclosing the mechanisms described hereinabove within a suitable casing. Thus, a casing element 58 encloses the upper portion of the central frame and a second casing element 59 encloses the bottom portion of such frame. A casing element 6| encloses the bottom, sides and rear end of the lever 4!. Free movement of the lever 4| and its attached casing "9! from the open position shown in 1 and 3, into its closed orpunching position is made possible by providing a longitudinal slot 62 in the bottom wall of the handle casing element 59 through which the free edges of the walls'of the lever casing 6| are telescoped. A lip 53 is provided on the end wall of the lever casing 6| to engage a stop formed on the lower end of a strap 94 welded or otherwise secured to the body portion !2 of the central frame so as to limit outward or spreading movement of the lever under tension of spring 55. Thus, it will be seen that the entire mechanism is enclosed within a casing and the device is devoid of any openings, other than the jaw opening l5, which might become an annoyance or even cause injury to the user.

.A perforating device of the above described character is particularly useful for perforating cards or'the like of the kind mounted on carriers or frames primarily because the perforating device of the present invention utilizes a previously formed perforation as the die in a perforating operation of the perforating element or punch 34. A typical device with which a perforating device of the present invention is adapted to be used is fragmentally illustrated in elevation in Fig. 9 'of the accompanying drawings,

this particular device being of the charaoter'to which the aforesaid copending application of Carl J. Hueber relates. The printing and control device thatis illustrated in Fig. 9 includes a carrier or frame 65 desirably formed from sheet metal or a plastic material, and one or more cards as 69 are retained on one face of the sheet metal frame by suitable retaining device as 68,

whereby a field or area is defined on the carrier or frame 65. Perforations may be formed in the card 69, which in this instance is retained along one edge of the frame 65, to control operation of at least one predetermined mechanism included in the machine through which devices of the character shown in Fig. 9 are sequentially passed. Hence, perforations formed in the field defined by the card 69 will constitute what are known as selection controlling perforations in that the presence or absence of a perforation in the card 69 at one or more predetermined positions will bring about or suppress the operation of at least one mechanism in the machine through which such'printing and control devices are sequential- 1y passed.

The positions whereat such function controlling perforations may be selectably located are determined by the positions of perforations or openings 61 in the portion 66 of the frame 65 which underlies the card 69, the retaining devices as 68 retaining the card 69 in predetermined relation with respect to the perforation 6?. It has been found to be advantageous to print numerical designations as H on the card at the positions whereat perforations may be formed therein in alignment with the perforations 61. Thus when a card 69 is accurately located in the retaining devices 68, the numerical designation H Will be respectively aligned with perforations 57, and such numerical designations serve to identify the different positions whereat perforations may be formed in the card 63 in alignment with.

perforation 61.

The formed portion or punching part 36 of the punch 34 of the hereinabove described perforating device is desirably related in size to the diameter of perforations or openings as 61 in the device bearing the card in which perforations a 'are to be formed by such punching part 36, the

sertion of the plunger or guide 35 into an open ing 61 insures that the punch part 36 will be aligned with the portion of the card in which a perforation is to be formed, the parts being shown in such relation in Fig. 7. .Hence when the casing element 6|, andtherefore the lever 42,

are moved toward the body portion I2 of the central frame, the punch part 36 is advanced toward the portion of the card aligned with the perforation 67 in which the guide 35 is disposed. As the punch part 36 advances from the position thereof shown in Fig. 7 into the position thereof shown in Fig. 8, a'slug I2 is punched from the card 69, the edge of the perforation 6'! serving as the die in this punching operation. Oncethe punching operation is complete, the pressure on V the casing 6| is relieved and thereupon the spring 56 returns the casing BI and thelever 42 tothe position thereof shown in Fig., 3, and in this operation the punch 34 is retracted into the position shown thereof in Fig. 7.

In the course of advancing of the punch part I 36 from the position thereof "shown in Fi .7 into the position thereof shown in Fig.8, the punch part 36 is effective to force the guide or plunger 35 from the projected position thereof shown in Fig. 7 into the retracted position thereof shown in Fig. 8 whereat the guide 35 is forced out of the opening 61- in which it has been disposed. When, however, pressure on the casing 6| is relieved and the punch .34 restores to the position thereof' shown in Figs. 3 and '7, the spring 38 is effective on the plunger or guide 35 to returnthe same from the retractedposition thereof shown inFig.

8 into the projected position thereof shown in 1 Fig. 7, and in the course of the returnof the plunger 35 to the projecting position thereof shown in Fig. 7, this plunger is effective to eject the slu l2. Desirably at the time pressure is relieved on the casing 6|, the frame or carrier 65 is moved upwardly away from the guide bushing 31 so that as the plunger 35 ejects the slug 12 the carrier or frame 65 will be disposed above the guide bushing 31 wherefore the slug l'Zmay fall from the perforating device. 1 In order to insure stripping of the punch p 36 from the perforation formed in the card'69 and from the perforation 61 in the carrier or frame 65, a stripper plate 73 isdisposed in a jaw In any event, however, the material of which be formed in the card 69 at one of the positions designated by a numerical designation 1 I, the carrier or frame 65 is inserted into the jaw opening l5 of the perforating device and the plunger or guide 35 is caused to pass into the perforation 61 underlying the' numerical designation H whereat a perforation is to be formed in the card 69. Inasmuch as the plunger 35 and the punch part 36 are aligned one with the other, the inopening l5. This stripper plate is desirably-substantially- L-shaped in configuration and the h stem thereof is passed through'an opening 14 in the vertical wall 25 of the reinforcing element 22 to dispose the foot portion of the L shaped stripper plate inengagement'with the inwardly disposed face of the vertical wall 25 and these 7 abutting portions are joined by Welding as 1601* in other suitable manner. The forward edge of the stemof the strip or plate 13 is disposed above the inwardly disposed portion of the'lo'ushing 3'! but out of alignment with the path of travel of the punch part 36, and this arrangement insures that the portion of the carrier or frame 65 will be disposed beneath the stripper plate ,13 when the guide or plunger 35 is inserted into, one of the perforations 61. Therefore, if the carrier or frame 65 tends to move upwardly with the punch part 36 in the course of retracting movement of 7 this. part from the position thereof shown in Fig.

8 into the positionthereof shown inFig. 7,;th'e

portion of the carrier 65 disposed beneath the stripper plate 13 will move into engagement with this stripper plate and thereby upward move ment of the carrier 65 with the punch part 36 is arrested wherefore, under the action of the spring 66, the" part 36 will move out of the perforation 61 and'the perforation formed in' the aligned part of the-card 69 50 as to thereby enable the carrier 65 to be freely retracted from the jaw opening Iii.

The toggle arrangement including intermediate link 51 and the spring 55 is so arranged that if for any reason the punch part 36 engages a part of the carrier 65 in the course of the advancing movement of the punch part 36 from the position thereof shown in Fig. 7 into the position thereof shownin Fig. 8, the toggle arrangement will yield or break so that further advancing movement will not be imparted to thepunch 34 notwithstanding continued application of pressure on the casing 6|. Thus the toggle arrangement is related to. the strength of the material'that the punch part 36 is intended to perforate, and the relation is such that when the punch part 36 engages a material stronger than the material said punch is intended to perforate, the toggle will yield or break, this relation primarily being determined by the strength of the spring 55.

While the. provision of a toggle arrangement of the above described character intermediate the lever 42 and the punch 34 is advantageous, it is not essential that such an. arrangement be included in a. perforating device of the present invention. Thus, for example, if the carrier or frame is formed of a ferrous material while the card as 69 is formed. of heavy paper or cardboard, there will be such a difference in the relative strengths of these two materials that it will require the application of considerably more pressure on the casing St to form a perforation in the carrier as 65 thanin acard as 69 and in such instances a positive interconnection may be interposed between the lever as 42 and the punch as 34. When resort is had to such an arrangement,

and the punch part 36 is engaged with the material of a carrier as 65, the increased resistance to.

advancing of the punch 34 will be sensed by the user who may therefore shift the perforating device so as to align the punch part 36 with the perforation as 61, which alignment will not be realized in those instances where the punch part 36 engages the material of a carrier as 65 and such an arrangement will in most instances insure against injury to either the perforating device or a carrier as 65.

A perforating device including a positive interconnection rather than a toggle interconnection between the actuating lever and the punch thereof is illustrated in Figs. 10 and 11. The perforating device illustrated in Figs. 10 and 11 is identical in all respects with that described hereinabove except insofar as the interconnection between the actuating lever and the punch is concerned. Therefore, reference characters are applied to the various elements as these appear in Figs. 10 and 11 which are identical with the reference characters applied to these elements as these appear in Figs. 1 to 8, inclusive, except that the sufiix a is added to these reference characters where they are applied in Figs. 10 and 11. In the form of perforating device illustrated in Figs. 10 and 11 in place of the hereinabove described toggle connection, a link H is interposed between the rocker arm 45a of the actuating lever 42a, one end of the link Tl being connected to the rocker arm 45 by a pin Ma and the other end of the link 1"! being connected to the lever 42a by a pin 55a.

It will be understood that the punch 34a of the perforating device shown in Figs. 10 and 11 is operated in the same manner as the Punch 34 in the form of the perforating; device shownin Figs. 1 to 8, which is to say, application of'pressure to the casing 61a is effective through. the link I1 and the rocker arm 45a to cause the" punch 34a to advance the punch part 36a thereof toward the guide or plunger 35a in the manner described hereinabove withreference to the form of perforating device shown in, Figs. 1 to 8; inclusive.

The formsof the-novel perforating device of this invention hereinabovedescribedenable the above set-forth and related objects of this invention to be realized, and it is, therefore, to be understood that while we have illustrated and described selected embodiments of our'invention, these are capable of variation and modification and we therefore donot' wish to be limited to the precise details, set forth but desire to avail ourselves of such changes and alterations as fall within the purview of the following claims.

We claim:

1. A punch of the kind to perforate a card mounted on a frame having a perforation therein, a handle, a jaw atoneend of said handle toreceive said frame, a resiliently depressible guide.

plunger extending into said jaw, said plunger being engageablein a frame perforation, apunch tool reciprocably mounted in said handle above and in axial alignment with said plunger, means to advance said punch tool into the jaw, said punchtool coacting with the frame perforation to perform a hole in the card of the same size as and in register with said perforation, and a.

stripper. in said jaw to strip the perforated card.

and frame from the punch tool when the latter returns to its initial position.

2. A punch of the kind toperforate a card. mounted on a frame having a perforation therein, a handle, a jaw at one end of said handle to receive said frame, a resiliently depressible guide plunger extending into said jaw, said plunger. being. engageable in a frame perforation, a punch,

tool reciprocably mounted in said. handle in axial alignment with said plunger, means to advance said punch tool into the jaw, said punch tool coacting with the frame perforation to perform a hole in the card of the same size as and in register with said perforation, and a stripper in said jaw to strip the perforated card and said frame from the punch tool when the latter returns to its initial position, said resiliently depressible guide plunger ejecting the punched slug when the tool is withdrawn.

3. In a punch, an elongated handle including an enclosure casing, an elongated lever pivotally connected at one end to one end of the handle, a spring normally retaining the lever in an extended position, a casing on said lever, said casing telescoping into the enclosure casing on the handle, a jaw at the connected end of said handle, a resiliently depressible guide plunger in said jaw adapted to receive thereover an article to be perforated, a punch tool in said jaw in axial alignment with said plunger, a rocker arm operatively engaging said punch tool, and a toggle link connecting said rocker arm with the lever whereby upon movement of the lever towards the handle the punch tool is moved to penetrate the article and depress said plunger.

4. In a punch, a handle, a lever pivotally connected at one end to one end of the handle, a jaw at one end of said handle, a reinforcing frame in said jaw, a resiliently supported guide plunger carried in said frame adapted to receive thereover an article to be perforated, a punch tool guided in said reinforcing frame in axial alignguide plunger in said jaw adapted to receive thereover an article to be perforated, a punching tool in said jaw in axial alignment with said plunger, and means connecting said tool with the lever whereby upon movement of the lever relative to the handle the tool is moved to penetrate the article and depress said plunger.

6. A punch for perforating sheets comprising a frame having a sheet receiving jaw at one end, a handle at the end opposite the jaw, a die in said jaw, a punch tool movable in said jaw above said die, a lever movable relative to the handle, an operating connection between said lever and punch tool, said connection being collapsible, and means resisting thecollapse of said connection until a 7 for connecting the lever to the punch,and resilientlmeans for resisting collapse of said means,

said resilient means being efiective' to resist collapse when said one sheet is perforated through a perforation in the other sheet, but ineffective to prevent collapse when it is attempted to perforate both sheets. r I

9. vAUpunch for perforating one of a pairiof superimposed sheets, the other of aid pair having perforations at least one-of which is aligned with the region in said one of said sheets to beperforated, said punch comprising a handle, ajaw at one end of said handle, a punch tool carried by predetermined force is applied between the lever and punch.

7. A punch for perforating sheets comprising a frame having a sheet receiving jaw at one end, a handle at the end opposite the jaw, a die in said jaw, a punch tool movable in said jaw above said die, a lever movable relative to the handle, a toggle connection between said lever and punch tool, and means transforming said toggle into a unitary link when the force applied between the lever and punch tool is below a predetermined minimum value,

8. A punch for perforating one of a pair of superimposed sheets, the other of aid pair having perforations at least one of which is aligned with the region in said one of said sheets to be perforated, said punch comprising a handle, a jaw at 4 one end of said handle, a punch tool carried by the handle and reciprocable into the jaw, a lever pivotally mounted on said handle, collapsible means the handle and reciprocable into the jaw, a lever pivotally mounted on said handle, toggle means connecting the lever to the punch, resilient means tending to expand the toggle, and means limiting the expansion of the toggle, said'resilient means being effective'to resist contraction of the toggle when said one sheet is perforated through aperforation inthe other sheet, but inefiective to prevent contraction when it isattemptedto perforate both sheets. r

, 10. A punch for perforating sheets comprising a frame'having a sheet receiving jaw at one end, a handle at the endopposite the jaw, a die in said jaw, a punch tool movable in said jaw above said die, a lever movable relative to the handle, a link pivotally connected to thelever, a lever connected to the punch, a link connected to the punch lever, a pin connecting the links to form a toggle thereof,

resilient mean urging the links into alignment with one another, and a'tab on one link adapted to contact the other link to limit the aligning movement, such that said links constitute auni tary force-transmitting member for the force re- CARL J. HUEBER, DONALD A. STARK.

tion. 

